Glass-working apparatus



Patented Nov. 27,- 1928. v

STATES PAT NT KARL E. PEEILER, OF WEST. HARTFORD, CONNECTICUT, ASSIGNOR TO HARTFORD-EM- JPIRE COMPANY, OF HARTFORD,

CONNECTICUT, A CORPORATION OF DELAWARE.

amiss-WORKING APPARATUS.

continuation of application Serial No. 24988, filed April 21, 1925. This application filed December 7,

' 1926. Serial No. 153,093

My invention relates to the art of separating mold charges of molten glass. from. a supply in a tank or pool, by means of molds or feeding cups that are brought mtocontact a with the surface of the glass and are charged with glass by suction produced in the molds or cups;

The general object of my invention is to provide an improved'method and apparatus for operating such suction-charged receptacles so as to control accurately the amount of glass that is charged into each receptacle.

More specifically, one object of In? invention is to provide vertically adjustab eshearing mechanism for. suction feedingcups an for the suction molds of multiple-mold machines of the type disclosed inthe patent to Owens No. 766,768, so that .the quantitypf glass in the cups or in the molds may be varied at will. By the independent vertical adjustment of this shearing mechanism, uniform amounts of molten glass, may be separated from the gathering pool for all. the cups or molds, irrespective of any irregularities therein which may cause variations of the cubic contents thereof; or, if desired, unequal quantities of molten glass may be accurately collected in the several cups ormolds to form ware of different weights on the same maso chine.

In the following will be described mainl in connection with suction-fed parison molds. It will beunderstood that this description applies equally as well to feeding cups that are charged by suction and thereafter empty their charges into molds, and that my invention includes both of these kinds of apparatus.

In the suction-type molds that are at pres- 4c entin use, the glass in each mold is separated from the glass in the gathering pool by means of a shear contact with the lower surface of the mold or in contact with a shear-bushing carried by the mold. No means have heretofore been provided to compensate for inaccuracies of the interior configuration of the mold cavity which are caused by general wear and cleaning, or for the wearing away of the bottom so of the mold by reason of the frictional contact of the shearing element therewith, or for repairs occasioned thereby.

In some cases it is desirable to adjust the weight of the mold charges gathered by a description, my invention blade which slides across and 'ingiven mold orv set of molds to suit different requirements. In other cases it is desirable to obtain a precise quantity of molten glass for molds of a multiple-mold machine, so that finished ware of different forms and weights may be produced by the same machine and by means of-similar parison molds.

The same considerations apply to transfer cups which lift charges of glass by suction d and then deposit the charges in inolds. It is desirable to control the exact quantity of glass that is segregated by each cup, so as to insure that all cups of a given installation will segregate equal charges, or'to alter the quantities segregated by different cups, as may be desired.

According to this invention, a pair of opening and closing shear blades is provided for each cup or mold, and the height of the shearing plane beneath each cup or mold is ad-- justed in respect to the bottom of the cup or to suit the requirements of that particular receptacle, thus permitting inaccuracies in the receptacles to be corrected, and also permitting the production ofunequal mold charges by receptacles ofthe same size. I

In the accompanying drawings:

Figure 1 is a plan view of a shearing apparatus constructed in accordance with this invention, with parts removed 'for clearness;

Fig. 2 is a side elevation thereof; and

Fig. 3 is a fragmentary vertical sectional view showing a modified form of shears.

Referring to the drawing, the numeral 10 indicates a parison mold of the suction type, I

adapted to cooperate with a gathering pool 11 to withdraw a quantity of molten material therefrom to form a mold charge 12. The connections for applyingsuction to the interior of the mold 10 form no part of the present invention, and are not illustrated herein.

The mold 10 is constructed in two parts which are removably attached to arms 13 fulcrumed on a pivot stud 14 secured in a bracket 15. This bracket may form a part of one unit of a multiple-mold glass forming ma chine, each unit having complete independent mechanisms to separate mold charges from a source of supply, to form parisons, and to produce the finished ware.-

tosever the molten glass in the parison mold from the glass in the pool. The detailsrof construction of this shearing device will now be described.

Coacting shear blades 16 are carried by levers 17 which are pivotally mounted for oscillatory movement on a stud. 18 secured to an overhanging arm 19 which is attached to, and may be integral with, a shear operating fluid pressure cylinder 20, the piston 21 of whichis connected to open and close the shear blades through a piston rod 22, a crosshead 23 secured to the piston rod 22, and links 24 which are pivotally attached to the crosshead 23 and to the shear levers 17.

The piston 21 is moved forward in the cylinder 20 to yieldingly close the shear blades by fluid pressure supplied to the rear of the cylinder through a pipe 25. A pipe 26 supplies fluid pressure to the front of the cylinder 20 to move the piston 21 to the rear and thus pull the shear blades apart.

The shear-operating cylinder, and the shear structure carried thereby, are projected bodily forward prior to each shear cut and are retracted after each shear cut, by means of a fluid pressure cylinder 34, and the cylinder 20 is arranged for vertical adjustment with respect to the cylinder 34. To this end, the cylinder 29 is mounted in a guideway 27 formed in a head 28 carried on one end of the piston rod 29 of-the cylinder 34. The vertical position of the cylinder 20, and of the shears carried thereby is adjusted by means of a screw 30 which extends through a screwthreaded opening in a bearing 32 formed in or attached to the head 28.

The inner end of the piston rod 29 carries a piston 33 which isreciprocate'd to advance the shearing mechanism into operative relation to the parison mold by admitting fluid pressure into the rear of the cylinder 34 through a pipe 35, and to retract said mechanism by introducing fluid pressure into the front of the cylinder through a pipe 36. The retraction of the shearing mechanism brings it to a cool zone when the shears'are not inoperation. Suitable air valves for actuating the shear cylinders and automatic timing mechanism for operatingsuch valves in their proper order are preferably provided, but are not shown in the accompanying drawing because such valves and timing mechanisms are well known in this art. I

In operation, the unit of the machine carry- 11, the mold 10 is lowered to the surface of the pool, a charge of glass is drawn up into the mold by suction, and the mold is lifted above the pool. The shearing mechanism is then projected forward by the cylinder 34 to bring the shear blades into proper position to sever the glass'beneath the mold, whereupon the cylinder 20 is operated to close the shear blades and sever the glass as shown in Fig. 2. The shears are then opened by the cylinder 20 and the entire shear structure is retracted to its starting position by the cylinder 34.

It will be noted that a substantial stub of glass remains, after shearing, below the mold 10. Vertical adjustment of the shearing plane changes the size of this projecting stub, and thus changes the size of the total mold charge to any desired extent within considerable limits.

Fig. 3 shows a modified construction in which the shears are made of hollow or box form, so as to give partial shape and support to the stub of glass above the shearing plane during and, if desired, after the shearing operation. In this figure, shear blades 40 are associated with the molds 10. These blades are formed with upward extensions 41 which to form an enclosure which supports the glass stub above the shears while the shears are closed. By suitably shaping the cavities 42, the shape of the stub of glass may be varied to suit the requirements of the parison. These box-shears are intended to be operated and vertically adjusted in the manner shown in Figs. 1 and 2.

This application is a continuing substitute for my copending application filed April 21, 1925, Serial No. 24,988, which contains the same disclosure as the present application in all respect-s except that the said application Serial No. 24,988 did not specifically state that this invention is applicable to suction feeding cups as well as to suction-fed molds.

In the subjoined claims, the term receptacle is intended to include any device, whether a mold, a gathering cup or other container, which segregates charges of molten material by lifting the charges through the action of suction produced within the receptacle.

This invention is not limited to the particular detailsof construction set forth here- 'in, and modifications may be resorted to withterial, said severing mechanism including shear bladesspaced below the receptacle, and means for adjusting said severing mechanism toward and from said receptacle to regulate the size of said charges.

2. In combination with a receptacle for seg- .to said receptacle.

said receptacle, fluidressure means 3. In combination with a receptacle for segregating mold charges of molten glass by suction, shear blades spaced below the receptacle and adapted to closebeneat-h said receptacle, and means for vertically'adjusting: the position of said shear blades with respect to said receptacle. i s

4. In combination with a receptacle for segregating mold charges of molten glass by suction, a severing mechanism adapted to separate a mold charge collected by said receptacle from a body of glass,.means for reciprocating said mechanism into *and out of position beneath said receptacle, and means for raising and lowering said severing mechanism in respect to said receptacle' 5. In combination with a receptacle for segregating mold charges of molten glass by suction, shear blades adapted to close beneath said receptacle to separate a mold charge collected by said receptacle from abody of glass, means for reciprocating said shear blades into and out of position beneath said receptacle, means for opening and closing said shear blades, and lowering said shear to said receptacle.

6. In combination with a receptacle for segregating suction, shear blades adapted to separate a mold charge collected by said receptacle from a body of glass, fluid pressure meansfor reciprocating said shear blades into and out of shearing position, means for opening and closing said shear blades,

from said receptacle.

7. In combination with a receptacle for segregating mold charges of molten glass by suction, shear blades adapted to close beneath said receptacle to separate a mold charge collected by said receptacle from a body of. glass, fluid-pressure means for reciprocating said shear blades into and out of position benegth or opening and closing 'sald shear blades, and means for raising and lowering said shear blades with respect to said receptacle.

8. In combination with a receptacle for segregating mold charges of molten glass by suction, shear blades adapted to separate a reciprocate said shear and means for raising. blades with respect' mold charges of molten glass by and means for ad- -justing said shearblades toward and away .body of glass,

mold charge collected by said receptacle from a body of glass, means for reciprocating said shear blades into and out of severing posi-- tion, fluid-pressure means for opening and closing said justing said shear blades towardand away from said receptacle.

' 9.1m combination with a receptacle for Y segregating mold charges of molten glass by suction, shear blades adapted to close beneath said receptacles to separate a mold charge collected by said receptacle from a body of glass, a fluid pressure cylinder connected to. blades into and out of severing position beneath said receptacle, a fluid-pressure cylinder supporting said shear blades and connected to open and close said shear blades, and means for vertically adjusting said last-named cylinder with respect to said receptacle.

10. In combination with 'a receptacle for segregating mold charges of molten glass by suction, sheer blades a apted to close beneat said rece tacle to separate a mold charge collected y said receptacle from a body of glass, a fluid-pressure cylinder connected to reciprocate said shear blades into and out of severing position beneath said receptacle, a fluid-pressure cylinder supporting said shear blades and connected to open and close said shear blades, and means for vertically adj usting said last-named cylinder with respect tosaid receptacle, said adjusting means com-' prising a guideway carried by'the piston rod of said first-named-cylinder and slidably ear rying said second cylinder, and an adjusting screw for fixing the position of said second cylinder with respect to said guideway.

s 11. In combination with a receptacle forsegregating mold charges of molten glass by suction, shear blades adapted .to close beneath said receptacle and to separate charge collected by said receptacle from a body of glass, said shear, blades being shaped to support and shape the stub of glass remaining above the shearing plane after severance, and a cylinder and'reciprocable piston for supporting and actuating said shear blades. I

a mold shear blades, and means for ad- 12. In combination with a receptacle for segregating mold "charges of molten glass by suction, shear blades adapted to close beneath said receptacle and t9 separate a mold charge collected b said rece tacle from a sai shear bla es having cooperating cavities which, when said shears are closed form an enclosure for supporting and shapmg the stub of glass remaining above the shearing plane after severance, and

a cylinder andreciprocable piston for sup--125 portingand actuating said shear blades.

13. In combination with'a receptacle for segregating charges of molten material by suction,severing mechanism adapted to sepalit 'tacle to the severing plane.

at neeaeee rate a mold'charge of molten material col-' glass so that a stub ofglass extends tronithe lected by said receptacle from a body ot such receptacle, and shaping said stub. material, a cylinder and reciprocable piston 18. The method of forming a mold charge for supporting and actuating said severing of molten glass, which comprises drawing mechanism, and means for adjusting said sevglass upwardly by suction from a pool of ering mechanism toward and from said re glass into a receptacle, and severing the conteptacle to. regulate the size of said, charge. necting port-ion of glass between the recep- 14:. In combination with .a receptacle for tacle and the pool ata plane spaced below-the segregating mold charges of molten glass byreceptacle bottom and simultaneously shapsuctio'n, shear blades adapted to close beneath ing the stub of glass between the receptacle said receptacle, a cylinder and reciprocable and the severing plane. piston for supporting and actuating said 19. The method of controlling the size of shear blades, and. means for. vertically admold charges of molten glass athered from justing the position ofsaid shear blades with a glass supply by a suction ed receptacle, respect to said receptacle. which comprises periodically presenting the 15. The combination, with a receptacle for I receptacle to. the surface of the glass, drawing segregating charges of molten glass by sucglass upwardly into said receptacle and sevtion, of severing means spaced below said reering the glass in a plane spaced below the 'ceptacle for separating charges, collected by receptacle, the distance of the severing plane said receptacle, from a body of molten glass, below the receptacle varying with the size of and means for shaping the stub of glass dethe charge desired. pending from said receptacle after each sev- 20. The method of obtaining a series of ering operation. 7 mold charges of molten glass of equal weight 16. The combination, with a receptacle for collected by a plurality of suction fed resegregating charges of molten glass by succeptacles having cavities of unequal cubic tion, of a pair of shear blades'arranged to capacity, which comprises successively preclose at a level spaced below .said outlet for senting the receptacles to the surface of a separating charges, collected by said recepglass supply, drawing charges of glass into tacle, from a body of molten glass, and means said receptacles and severing the glass gathoperable by said shear blades to support and ered in the successive receptacles from the shape the glass extending from said recep-Yglass of the supply in planes spaced from and below the receptacles, said-spacing being se- 17. The method of forming a mold charge 'lected and difl'ering in accordance with the of molten glass, which comprises drawing cubic capacity of the several receptacles. glass by suction from a body of molten glass into a receptacle, severing the connecting day of November, 1926. glass between the receptacle and the body of KARL E. PEllLlER- Signed at Hartford, Connecticut, this 17th 

